Concrete insert



Oct, 6, 1931. M. CARROLL CQNCRETE INSERT Filed March 20. 1930 4/2ZTTORNEY Patented Oct. 6, 1931 a -a e].

PATENT OFFICE.

MARTIN CARROLL, ,OF KANSAS CITY, MISSOURI CONCRETE INSERT Applicationfiled. March 20, 1930'. Serial No. 437,322.

My invention relates to improvements in concrete inserts.

It relates particularly to concrete inserts adapted for embedding in awall and for supporting bolts in positions for insertion through beamsor bars which are to be attached to said walls.

One of the objects of my invention is to provide a concrete insert, ofthe kind described,

with novel means for supporting and securely holding a bolt, which meanspermit the bolt to be adjusted radially laterally in all directions soaslto enable the bolt to enter an adjacent hole provided in the bar orbeam which is to be supported thereby.

A further object of my invention is to provide a novel insert of thekind described, which is simple, cheap, strong, durable, not likely toget out of order, which is easily and quickly mounted in operativeposition in a concrete form, which permits a maximum range of adjustmentin all directions ot the bolt supported thereby, and which-willyieldingly grip the bolt so as to hold it in the position to which itmay be adjusted.

The novel features of my inventionare hereinafter fully described andclaimed.

In the accompanying drawings, whichillustrate the preferredembodiment ofmy invention, .7

Fig. 1 is an'outside, end view of my 1mproved insert. j v i Fig.2 is 'aside elevation, partly broken away, of the same, showing the bolt in itsoutermost'position.

Fig. 3 is an enlarged section on the line 3-3 of Fig. 1, showing thebolt in its retracted position.

Fig. 4 is a reduced vertical section of the 40 insert, shown mounted ina form prior to the filling of the latter with concrete.

Fig. 5 is a reduced vertical section of the insert, shown mounted inconcrete and supporting an angle bar.

Fig. 6 is an enlarged the anchor member. r 7

Similar characters ct reference designate similar parts in the differentviews.

perspective view of My improved concrete insert is provided with housing1, preferably conical, and having an open outer smaller end and aclosedinner larger end.

Rotatably fitted in the housing 1 is a U shaped anchor member 2, thearms of which are resilient and converge toward each other outwardly,and which at their outer ends are respectively provided at theiradjacent inner sides with inwardly extending lips 3 disposed parallelwith the transverse portion j,

5 designates the threaded shank. of a bolt P longitudinally movable andalso laterally movable between the arms of the anchor member 2, andwhich is adapted to be moved from a retracted inner position, shown inFigs; 3 and 4: to an outermost position, shown 7.

in Figs. 2 and 5, in which position the threaded outer portion of thebolt will extend. through the open end of the housing 1, and will beadapted for extension through a hole provided theretorin a bar, such asthe angle bar 6, Fig. 5, which the bolt is to support.

The bolt has a polygonal head 7 having opposite flat sides, the formshown being square. Said head 7 is disposed between the arms of theanchor member 2, and the diameter of the head is such that, when thebolt is moved longitudinally outwardly to its outermost position, shownin Figs. 2 and 5, the head 7 will spread. apart the arms of the anchormember 2 and will engage the inner edges of the lips 3 thereof, so as tobe held from complete withdrawal from the housing 1. l r v The resilientarms of the anchor member 2 will grip the bolt. head 7 and yieldinglyhold the bolt in such position as it may be radially adjusted. The boltis adapted for sliding lateral movement betweenthe lips 3 from one sideof the open end of the housing 1' to the opposite side thereof. f

As the anchor member 2 is revoluble in the housing 1, such lateraladjustment of the bolt between the lips 3, will enable the bolt to havea universal lateral movement in any direction radially and to anyposition within the limits of the open end of the housing 1. Such radialadjustment in any direction and to any position in the open end of thehousing 1 affords a maximum of adjustability of the bolt, to enable itto enter a previously provided hole adapted to receiveit in a bar orbeam which the bolt is to support, as the angle bar 6, Fig. 5.

By reason of such large range of lateral adjustment of the bolt in thehousing 1, exact positioning ofthe housing 1 in the form 8, Fig. 4, isnot required.

In the employment of my improved insert, it is-mounted; in the concreteform 8 with the open end ot'the' housing 1 disposed against theinnerside of one side wall of the form. in which position it may betemporarily held by two nails, not shown, which are extended throughtworholes 9 respectively, Figs. 1 and 3, with which the peripheralflange 10 at the large end of the housing 1 is provided.

In this position ot'the housing, in the form 8.; the bolt 5 is in itsinnermost position, wholly within the housing 1-. By reason of theb'olt'beiug adjustable to a position wholly within the housing 1. asshown in Figs. 3 and 4". the housing 1 may be fastened with its open endagainst the inner side otthe'form 8, as shown in Fig. 4. and with thebolt within the housing readv for-withdrawal to its extended outer.operative position; after the removal of the form, and eliminating therequirement of holes in the side of: the form, such would be required incase the bolt was in the housing and could'not be retracted to aposition wholly therein.

After the concrete 11 is pouredin the form and has'hardened', the formis removed. and the housing 1 will then be held by the concrete with theouter open end of the housing flush with the outer surface of theconcrete 11. as in Fig; 5. The housing 1 will now be formly held by theconcrete.

The bolt 5 is then drawn outwardly to the position shown in Fig. 5 andadjusted laterally between the arms oi the anchor member 2. the latterbeing revolved until the bolt 5 is disposed in proper position forinsertion into the hole provided therefor in the angle bar 6. or otherbar or beam that the bolt is to support. After the insertion of the boltinto said hole in the angle bar 6, a nut 12 is mounted on the bolt by atthe outer side of the ang e bar thereby fastenin said bar firmly to theconcrete wall or beam 11.

By reason of the resilient arms of the anchor member 2 gripping the head7 of the bolt, when the latter is in the outermost posi tion, the boltwillbe held in its adjusted position until inserted into the hole in thebar it is to support.

The housing 1 may be made of suitable material, such as galvanized sheetiron or steel, as shown. The anchor member must be made of material ofsutiicient strength to enable the lips 3 to withstand the strain of thebolt head 7 applied in an outward direction against them after the angleiron is fastened to the bolt. The housing 1 at its outerend may be ofrelatively light material, such as will enable it to be easily bentrearwardly in case such is needed to bring the outer end of the housingflush with the outside of the concrete 11. The open end of the housinglwill be closed by the angle bar 6, after the latter is mounted in place-It will be obvious that my improved insert may be embedded for likepurposes and with equaleffect in brick or stone work, plaster or thelike, as well, as in concrete work.

I do not limitmy invention to the structure shown and described, as manymodifications, within the scope of the appended claims, may be madewithout. departing from the spirit of my invention.

\Vhat I claim is 1. In a concrete insert, a housing adapted for mountingin a form and having an open end adapted to bear against the inner sideof said form, a bolt and an anchor member in and adapted for limitedrotation relatively to said housing, and having means adapted to holdsaid bolt radially and longitudinally adjustable thereon and fromcomplete withdrawaland rotation relatively thereto, said meanspermitting said bolt to be moved longitudinally to and from a positionin which the threaded end portion will extend through said open end,said bolt being adjustable to a position in which it will be whollywithin said housing.

2. Ina concrete insert, va housing adapted for mounting in a form andhaving an open end adapted to bear against the inner side of said form,and a U shaped anchor member rotatable in said housing on an axis extending through said open end, the arms of said member being resilient andconverging outwardly and adapted to grip the head of a bolt radiallyadjustable between said arms and to hold said bolt from completewithdrawal and rotation relatively to said member while permitting saidbolt to be moved to and from a position in which its threaded endportion will project from said open end.

3. In a concrete insert, a housing adapted for mountingin a form andhaving an open end adapted to bear against the inner side of said form,a U shaped member rotatable in said housing to an extent less than acomplete revolution, the arms of said member being resilient andconverging outwardly and on their adjacent sides having lips, the axisof rotation of said member extending through said open end, and a bolthaving its head disposed between and held from relative rotation by saidarms, said bolt being radially adj ustable between and held fromcomplete withdrawal by said lips, said bolt being longitudinally movableto and from a position in which its threaded end portion will extendoutwardly through said open end, and in said 7 position being supportedin its adjusted po- 10 sition by and expanding said arms.

In testimony whereof I have signed my name to this specification.

MARTIN CARROLL.

